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We report the first records of Brush-legged Mayfly, Isonychia ignota (Walker, 1853), from Latvia and Estonia together with an overview of the species global distribution. Nymphs were found from two localities in the Gauja River. Our findings represent the northwestern limit of the known distribution of I. ignota in the Palaearctic.
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Ozoliņš et al. (2026) studied this question.
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